Shir is using v1.9.2 though, although in R 3.2.0 apparently which might
mean R 3.0.2 perhaps.
Anyway regardless of versions, the example code results in errors. Shir?
> # dates
> dt.dateEx <- data.table(date =
as.character(seq(as.Date('2014-04-01'), as.Date('2014-04-15'), by = 1)))
> setkey(dt.dateEx, date)
>
> # hours
> dt.hrEx <- copy(dt.dateEx)
> dt.hrEx <- dt.hrEx[, list(hour_beginning =0:23), by = list(dt =
date)] # rep x24 per date
> setkey(dt.hrEx, dt, hour_beginning)
>
> # as expected
> dt.classEx[dt.dateEx][, list(dt, hour_beginning)]
Error: object 'dt.classEx' not found
>
> # not expected outcome
> dt.classEx[dt.dateEx, list(hour_beginning)]
Error: object 'dt.classEx' not found
>
On 24/03/14 19:57, Eduard Antonyan wrote:
You're probably expecting the by-without-by behavior - see this post:
http://r.789695.n4.nabble.com/by-EACHI-and-related-please-check-ok-td4686732.html
and follow the links within for more detail.
On Mon, Mar 24, 2014 at 2:37 PM, Shir Levkowitz
<[email protected] <mailto:[email protected]>> wrote:
It looks like the latest version of data.table has changed the
behavior of list( ) inside of a join - is this behavior as
expected? Has anyone reported or encountered this change? It seems
like a bug to me. I am using data.table v1.9.2 in R 3.2.0 .
Thanks,
Shir Levkowitz
#-----------------------------------------------
library(data.table)
# dates
dt.dateEx <- data.table(date =
as.character(seq(as.Date('2014-04-01'), as.Date('2014-04-15'), by
= 1)))
setkey(dt.dateEx, date)
# hours
dt.hrEx <- copy(dt.dateEx)
dt.hrEx <- dt.hrEx[, list(hour_beginning =0:23), by = list(dt =
date)] # rep x24 per date
setkey(dt.hrEx, dt, hour_beginning)
# as expected
dt.classEx[dt.dateEx][, list(dt, hour_beginning)]
# not expected outcome
dt.classEx[dt.dateEx, list(hour_beginning)]
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